Electromagnetic valve, shock absorber and vehicle

Abstract

The utility model relates to an electromagnetic valve, a shock absorber and a vehicle. The valve body and the valve port are fixedly connected, the valve element, the coil and the magnetic conducting piece are arranged in an inner cavity of the valve body, the valve element is in sliding connection with the valve body, the coil is arranged on the outer side of the valve element in a sleeving mode, and the magnetic conducting piece is fixed to the side, away from the valve port, of the coil; the valve element comprises a plug and an iron core which are fixedly connected, the plug is located between the iron core and the valve port in the axial direction of the coil, and the magnetic conductive piece is used for being matched with the electrified coil to drive the iron core to slide and drive the plug to close the valve port. When the coil is powered off, the end, away from the valve port, of the iron core extends out of the magnetic conducting piece or is flush with the end face, away from the valve port, of the magnetic conducting piece. According to the electromagnetic valve, the magnetic conducting part is arranged on the side, away from the valve port, of the coil, so that when the coil is powered off, the iron core can stretch out of the magnetic conducting part or is flush with the end face of the magnetic conducting part, the electromagnetic force acting on the iron core when the coil is powered on is increased, and the valve closing efficiency of the electromagnetic valve is improved.

Description

Technical Field

[0001] The present application relates to the field of solenoid valves, and particularly to a solenoid valve, a shock absorber including the solenoid valve, and a vehicle including the shock absorber. Background Art

[0002] In the prior art, a solenoid valve generally includes a valve body and a valve port fixedly connected, as well as a valve core and a coil disposed in the inner cavity of the valve body. The valve core is slidably connected to the valve body, and the coil is sleeved outside the valve body. When the coil is energized, the electromagnetic force generated by the coil can drive the valve core to slide towards the valve port to realize the valve closing function of the solenoid valve.

[0003] When the solenoid valve is de-energized, the elastic force stored in the elastic member between the valve core and the valve body will drive the valve core to slide away from the valve port to realize the valve opening function of the solenoid valve. However, since the elastic force stored in the elastic member is relatively large, and the electromagnetic force generated by the energized coil needs to be greater than the elastic force of the elastic member to realize valve closing, the valve closing efficiency of the solenoid valve is thus reduced. Summary of the Utility Model

[0004] In view of the above deficiencies of the prior art, the purpose of the present application is to provide a solenoid valve with improved valve closing efficiency, a shock absorber including the solenoid valve, and a vehicle including the shock absorber. Specifically, the following technical solutions are included:

[0005] In a first aspect, an embodiment of the present application provides a solenoid valve (100), which includes a valve body (10) and a valve port (21) fixedly connected, as well as a valve core (30), a coil (40) and a magnetic conductive member (50) disposed in the inner cavity (10a) of the valve body (10). The valve core (30) is slidably connected to the valve body (10), the coil (40) is sleeved outside the valve core (30), and the magnetic conductive member (50) is fixed on the side of the coil (40) away from the valve port (21);

[0006] The valve core (30) includes a plug (32) and an iron core (31) fixedly connected. Along the axial direction of the coil (40), the plug (32) is located between the iron core (31) and the valve port (21). The magnetic conductive member (50) is used to cooperate with the energized coil (40) to drive the iron core (31) to slide and drive the plug (32) to close the valve port (21);

[0007] When the coil (40) is de-energized, the end of the iron core (31) away from the valve port (21) extends out of the magnetic conductive member (50), or is flush with the end face of the magnetic conductive member (50) away from the valve port (21).

[0008] In the solenoid valve of the present application, a magnetic conductive member with magnetic conductivity is arranged on the side of the coil away from the valve port, so that the magnetic field generated by the energization of the coil can pass through the iron core under the action of the magnetic conductive member, enabling the iron core to be magnetized under the action of the magnetic field generated by the coil and being subjected to the electromagnetic force generated by the coil to slide towards the valve port, so as to control the plug to slide towards the valve port and close the valve port, thereby realizing the valve closing function of the solenoid valve of the present application.

[0009] Meanwhile, the solenoid valve of the present application also controls the position of the iron core when the coil is de-energized, so that the end face of the iron core away from the valve port can extend out of the magnetic conductive member or be flush with the end face of the magnetic conductive member away from the valve port when the coil is de-energized, thereby increasing the number of magnetic induction lines passing through the iron core via the magnetic conductive member when the coil is energized, improving the magnetic flux of the iron core, enhancing the magnetization efficiency of the iron core and the electromagnetic force received by the iron core. Furthermore, the valve closing efficiency of the solenoid valve of the present application is improved.

[0010] In one embodiment, when the coil (40) is de-energized, the length dimension of the iron core (31) extending out of the magnetic conductive member (50) is less than or equal to 2 mm.

[0011] In one embodiment, the magnetic conductive member (50) is annular, and the magnetic conductive member (50) is fixedly coaxially arranged with the coil (40); or there are multiple magnetic conductive members (50), and the multiple magnetic conductive members (50) are arranged along the circumferential direction of the coil (40).

[0012] In one embodiment, the valve body (10) includes a housing (11) and a separator (12). Along the axial direction of the coil (40), the separator (12) is fixed between the housing (11) and the valve port (21). A guiding hole (121) is provided on the separator (12), and the valve core (30) passes through the guiding hole (121) and extends out of the valve body (10).

[0013] In one embodiment, along the axial direction of the coil (40), the projection of the iron core (31) on the separator (12) covers the guiding hole (121), and the separator (12) is used to prevent the iron core (31) from sliding out of the inner cavity (10a).

[0014] In one embodiment, the housing (11) has magnetic conductivity, and / or the separator (12) has magnetic conductivity.

[0015] In one embodiment, the solenoid valve (100) further includes an elastic member (60). The elastic member (60) abuts between the iron core (31) and the separator (12). When the coil (40) is de-energized, the elastic member (60) pushes the iron core (31) to slide away from the valve port (21) to drive the plug (32) to open the valve port (21).

[0016] In one embodiment, the elastic member (60) is a variable pitch spring, and along the axial direction of the coil (40), the pitch of the elastic member (60) near the valve port (21) is smaller than the pitch of the elastic member (60) away from the valve port (21).

[0017] In one embodiment, the solenoid valve (100) further includes an elastic buffer member (70) which is abutted between the isolation member (12) and the plug (32) to absorb the impact generated when the plug (32) contacts the valve port (21).

[0018] In one embodiment, the solenoid valve (100) further includes a magnetic isolation tube (80) which is at least partially received in the coil (40) and sleeved outside the iron core (31).

[0019] In a second aspect, an embodiment of the present application provides a shock absorber, including a housing, a piston, an oil storage tank, and a solenoid valve (100). The piston is slidably connected to the housing. One end of the solenoid valve (100) is used to communicate with the inside of the housing, and the other end is used to communicate with the oil storage tank. The solenoid valve (100) opens and closes to control the damping oil in the oil storage tank to enter the housing to cooperate with the piston to achieve damping.

[0020] In a third aspect, an embodiment of the present application provides a vehicle, including a vehicle body, wheels, and a shock absorber. The wheels are rotatably connected to the vehicle body. The housing of the shock absorber is fixed to the vehicle body, and the piston of the shock absorber is fixed to the wheels to absorb the vibration between the wheels and the vehicle body.

[0021] It can be understood that for the shock absorber provided in the second aspect of the present application and the vehicle provided in the third aspect, both have the effect of improving the valve closing efficiency because they adopt the solenoid valve provided in the first aspect of the present application. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of the solenoid valve provided in an embodiment of the present application;

[0023] Figure 2 It is a schematic cross-sectional structural diagram of the solenoid valve provided in an embodiment of the present application;

[0024] Figure 3 It is an exploded schematic diagram of the solenoid valve provided in an embodiment of the present application;

[0025] Figure 4 It is a schematic structural diagram of the solenoid valve provided in an embodiment of the present application when in the open valve state;

[0026] Figure 5 It is a schematic structural diagram of the solenoid valve provided in an embodiment of the present application when in the closed valve state;

[0027] Figure 6 Schematic diagram of a partial structure of a solenoid valve provided in an embodiment of the present application;

[0028] Figure 7 Schematic diagram of the structure of a magnetic conductive member provided in an embodiment of the present application;

[0029] Figure 8 Another schematic diagram of the solenoid valve provided in an embodiment of the present application.

[0030] Reference numerals: 100 - solenoid valve; 10 - valve body; 10a - inner cavity; 11 - outer shell; 111 - first opening; 112 - second opening; 113 - second mounting groove; 12 - spacer; 121 - guiding hole; 122 - main body part; 1221 - first mounting groove; 123 - protruding part; 124 - mounting hole; 13 - protective cover; 131 - through hole; 20 - valve seat; 21 - valve port; 22 - communication port; 23 - third mounting groove; 30 - valve core; 31 - iron core; 311 - first surface; 312 - positioning hole; 3121 - limiting protrusion; 32 - plug; 321 - air guiding hole; 33 - guide rod; 34 - protective sleeve; 40 - coil; 41 - coil body; 42 - bushing; 43 - conducting member; 50 - magnetic conductive member; 51 - second surface; 52 - avoidance groove; 60 - elastic member; 70 - buffer member; 80 - magnetic isolation tube; 91 - first sealing ring; 92 - second sealing ring; 93 - third sealing ring; D - spacing. Detailed implementation manners

[0031] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0032] The descriptions of the following embodiments refer to the attached drawings to illustrate specific embodiments in which the present application can be implemented. The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meaning. The terms "connection" and "coupling" used in the present application, unless otherwise specified, include both direct and indirect connections (couplings). The directional terms mentioned in the present application, such as "up", "down", "front", "rear", "left", "right", "inner", "outer", "side", etc., are only references to the directions in the attached drawings. Therefore, the directional terms are used to better and more clearly illustrate and understand the present application, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0033] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations. It should be noted that the terms "first", "second", etc. in the description and claims of the present application and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising", "may comprise", "including", or "may include" used in the present application indicate the existence of the corresponding functions, operations, elements, etc. disclosed, and do not limit one or more other functions, operations, elements, etc. In addition, the term "comprising" or "including" means the existence of the corresponding features, numbers, steps, operations, elements, components, or combinations thereof disclosed in the specification, and does not exclude the existence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof, and is intended to cover non-exclusive inclusion.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs. The terms used in the description of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0035] The vehicle provided by this application includes a body, wheels, and shock absorbers. The wheels are rotatably connected to the body so that the wheels can rotate relative to the body to drive the vehicle to travel. The shock absorbers are connected between the body and the wheels to absorb the vibrations between the wheels and the body.

[0036] Specifically, the shock absorber includes a housing, a piston, an oil reservoir, and a solenoid valve. Among them, one end of the piston is fixedly connected to the wheel, and the other end is slidably connected to the housing, and the housing is fixedly connected to the body. When relative vibration occurs between the wheel and the body, the piston can slide relative to the housing.

[0037] One end of the solenoid valve is used to communicate with the inside of the housing, and the other end is used to communicate with the oil reservoir. The oil reservoir stores shock-absorbing oil. When the solenoid valve is opened, the shock-absorbing oil enters the inside of the housing through the solenoid valve. During the actual use of the vehicle in this application, when an external impact acts on the wheel, the wheel will vibrate relative to the body, and this part of the impact will cause the piston to slide relative to the housing. The piston then transfers the external impact to the shock-absorbing oil through sliding to compress the shock-absorbing oil and generate a certain amount of heat. That is, the shock absorber converts the power of the external impact into heat energy and releases it outward through the shock-absorbing oil. Thus, the shock-absorbing function of the shock absorber for the vehicle in this application is realized.

[0038] Please refer to Figure 1 the schematic structural diagram of the solenoid valve 100 provided in an embodiment of the present application shown in Figure 2 the sectional structural diagram of the solenoid valve 100 provided in an embodiment of the present application shown in, and please refer to Figure 3 the exploded diagram of the solenoid valve 100 provided in an embodiment of the present application shown in. Among them, for the sake of convenience of description, Figure 3 some structures are omitted.

[0039] As Figures 1 - 3 shown, the solenoid valve 100 of the present application includes a valve body 10 and a valve seat 20. A valve port 21 and a communication port 22 are provided in the valve seat 20. Among them, the valve port 21 is used to communicate with an external first pipeline, and the communication port 22 is used to communicate with an external second pipeline. When the solenoid valve 100 of the present application is in the open valve state, the fluid flowing in from the first pipeline can flow into the valve port 21 and flow into the second pipeline from the communication port 22. When the solenoid valve 100 of the present application is in the closed valve state, the solenoid valve 100 of the present application can block the fluid flow between the first pipeline and the second pipeline.

[0040] Specifically, the solenoid valve 100 of the present application further includes a valve core 30 and a coil 40. Among them, both the valve core 30 and the coil 40 are received in the inner cavity 10a of the valve body 10, and the valve core 30 is slidably connected to the valve body 10. The coil 40 is sleeved outside the valve core 30 and is connected to an external circuit.

[0041] In the embodiment of the present application, the valve core 30 includes an iron core 31 and a plug 32. Along the axis direction of the coil 40, the plug 32 is located between the iron core 31 and the valve port 21. The coil 40 is sleeved outside the iron core 31, and the iron core 31 is fixedly connected to the plug 32.

[0042] Based on the fact that the iron core 31 has magnetic permeability. It can be understood that when the coil 40 is energized, the coil 40 can generate a magnetic field, and the magnetic induction lines in the magnetic field can pass through the iron core 31 and magnetize the iron core 31, so that an electromagnetic force that interacts with each other can be generated between the iron core 31 and the coil 40, thereby driving the iron core 31 to move relative to the coil 40, thereby controlling the plug 32 to slide toward the valve port 21 and close the valve port 21, realizing the closed valve function of the solenoid valve 100 of the present application.

[0043] As Figure 4 shown, when the coil 40 is not energized, the solenoid valve 100 is in the normally open state. Along the axis direction of the coil 40, the iron core 31 and the valve seat 20 are spaced apart from each other, and the plug 32 opens the valve port 21, so that the fluid flowing into the valve port 21 from the external first pipeline can flow into the communication port 22 through the gap between the valve core 30 and the valve seat 20 and flow into the second pipeline from the communication port 22, realizing the open valve function of the solenoid valve 100 of the present application.

[0044] When the coil 40 is energized, the electromagnetic force generated by the coil 40 acts on the iron core 31, causing the iron core 31 to slide axially along the coil 40 towards the valve port 21 and causing the plug 32 to slide towards the valve port 21. As Figure 5 shown, when the end of the plug 32 facing the valve port 21 abuts against the surface of the valve seat 20 provided with the valve port 21, the plug 32 shields the valve port 21, preventing the fluid in the external first pipeline from passing through the iron core 31 and the communication port 22 to communicate with the second pipeline, thereby realizing the valve closing function of the solenoid valve 100 of the present application.

[0045] Please refer to Figure 6 the schematic diagram of the partial structure of the solenoid valve 100 provided in an embodiment of the present application shown in. And cooperate with referring to Figures 1 - 5 . Among them, Figure 6 is the schematic diagram of the partial structure of the coil 40 of the solenoid valve 100 of the present application before being energized.

[0046] As Figures 1 - 6 shown, the solenoid valve 100 of the present application further includes a magnetic conductive member 50, and the magnetic conductive member 50 is fixed on the side of the coil 40 away from the valve port 21. Since when the coil 40 is energized to generate magnetic induction lines, the magnetic induction lines will diffuse around the coil 40, resulting in a relatively small number of magnetic induction lines passing through the iron core 31.

[0047] It can be understood that the setting of the magnetic conductive member 50 with magnetic conductivity can enable the magnetic induction lines generated by the energization of the coil 40 to be attracted by the magnetic conductive member 50, thereby improving the integration degree of the magnetic field generated by the coil 40, increasing the number of magnetic induction lines passing through the iron core 31, increasing the magnetic flux and magnetization efficiency of the iron core 31, and further improving the electromagnetic force of the energized coil 40 on the iron core 31, and improving the valve closing efficiency of the solenoid valve 100 of the present application.

[0048] At the same time, the magnetic conductive member 50 also has the function of guiding the magnetic field. Since the magnetic induction lines generated by the energization of the coil 40 are relatively dispersed, the magnetic induction lines passing through the position where the magnetic conductive member 50 is located may not pass through the iron core 31.

[0049] It can be understood that the setting of the magnetic conductive member 50 can enable the magnetic induction lines extending into the magnetic conductive member 50 to be guided by the magnetic conductive member 50 to the iron core 31, thereby further improving the magnetic flux and magnetization efficiency of the iron core 31, further improving the electromagnetic force of the energized coil 40 on the iron core 31, and improving the valve closing efficiency of the solenoid valve 100 of the present application.

[0050] On the other hand, the magnetic conductive member 50 also has the function of shielding external magnetic fields. During the use of the solenoid valve 100, there may be the action of external magnetic fields, which may affect the magnetic field distribution generated by the energized coil 40. That is, the setting of the magnetic conductive member 50 reduces the influence of the external magnetic field on the energized coil 40, ensures the magnetization efficiency of the energized coil 40 on the iron core 31, and ensures the electromagnetic force of the energized coil 40 on the iron core 31.

[0051] As Figure 6 shown, when the coil 40 is de-energized, the end of the iron core 31 away from the valve port 21 extends out of the magnetic conductive member 50. That is, when the coil 40 is de-energized, along the axial direction of the coil 40, the distance between the first surface 311 of the iron core 31 away from the valve port 21 and the valve port 21 is greater than the distance between the second surface 51 of the magnetic conductive member 50 away from the valve port 21 and the valve port 21, and there is a distance D between the first surface 311 and the second surface 51.

[0052] Since there is a gap between the magnetic conductive member 50 and the iron core 31 along the radial direction of the coil 40. It can be understood that the existence of the distance D enables more magnetic induction lines passing through the magnetic conductive member 50 to pass through the iron core 31 when the coil 40 is energized, realizing the magnetization of the iron core 31, thereby increasing the number of magnetic induction lines that can act on the iron core 31 guided by the magnetic conductive member 50 and improving the utilization rate of the magnetic conductive member 50 in the magnetic circuit of the solenoid valve 100 in this application.

[0053] At the same time, the existence of the distance D also increases the number of magnetic induction lines passing through the iron core 31, thereby increasing the magnetic flux of the iron core 31, increasing the electromagnetic force of the energized coil 40 acting on the iron core 31, and further increasing the valve opening efficiency of the solenoid valve 100 in this application.

[0054] Thus, the solenoid valve 100 in this application sets a magnetic conductive member 50 with magnetic conductivity on the side of the coil 40 away from the valve port 21, so that the magnetic field generated by the energized coil 40 can pass through the iron core 31 under the aggregation and guiding effects of the magnetic conductive member 50 on the magnetic induction lines, thereby increasing the magnetization efficiency and magnetic flux of the iron core 31, increasing the electromagnetic force of the energized coil 40 on the iron core 31, and further increasing the valve closing efficiency of the solenoid valve 100 in this application.

[0055] At the same time, the solenoid valve 100 in this application also controls the position of the iron core 31 when the coil 40 is de-energized, so that the end face of the iron core 31 away from the valve port 21 can extend out of the magnetic conductive member 50 when the coil 40 is de-energized, so as to cooperate with the magnetic conductive member 50 to further increase the number of magnetic induction lines passing through the iron core 31 when the coil 40 is energized. Further increase the magnetization efficiency and magnetic flux of the iron core 31, thereby further increasing the electromagnetic force of the energized coil 40 on the iron core 31 and further increasing the valve closing efficiency of the solenoid valve 100 in this application.

[0056] It can be understood that in another embodiment, along the axial direction of the coil 40, the end face of the iron core 31 away from the valve port 21 may also be flush with the end face of the magnetic conductive member 50 away from the valve port 21. The present application does not make special restrictions on this.

[0057] In one embodiment, please refer back to Figure 2 and Figure 6 As shown, when the coil 40 is powered off, the length dimension of the iron core 31 extending out of the magnetic conductive member 50 is less than or equal to 2 mm. That is, the distance D between the first surface 311 of the iron core 31 away from the valve port 21 and the second surface 51 of the magnetic conductive member 50 is less than or equal to 2 mm.

[0058] It can be understood that when the distance D is greater than 2 mm, the magnetic induction lines of the energized coil 40 guided by the magnetic conductive member 50 are difficult to pass through the area where the extending length of the iron core 31 is greater than 2 mm, which may result in no magnetic induction lines passing through the end of the iron core 31 away from the valve port 21. As a result, the partial extended area of the iron core 31 does not contribute to the increase of the electromagnetic force, causing cost waste of the solenoid valve 100 of the present application.

[0059] At the same time, the increase of the iron core 31 also increases the space of the solenoid valve 100 along the axial direction of the coil 40, thus affecting the space utilization rate of the solenoid valve 100 of the present application.

[0060] Therefore, setting the distance D to be less than or equal to 2 mm can, while ensuring the improvement effect of the cooperation between the extending part of the iron core 31 and the magnetic conductive member 50 on the electromagnetic force received by the iron core 31, reduce the influence of the extension of the iron core 31 on the space utilization rate of the solenoid valve 100, reduce the cost waste of the solenoid valve 100 of the present application, and ensure the magnetic circuit utilization rate of the solenoid valve 100 of the present application.

[0061] Next, in combination with four possible embodiments (Embodiment 1 - Embodiment 4) of the solenoid valve 100 of the present application and four typical embodiments (Comparative Example 1 - Comparative Example 4) in the prior art, the beneficial effects that the solenoid valve 100 of the present application may achieve will be compared and elaborated.

[0062] Embodiment 1

[0063] A solenoid valve 100 is provided, and the valve closing stroke of the solenoid valve 100 is 3 mm, and the distance D is 0 mm.

[0064] Embodiment 2

[0065] A solenoid valve 100 is provided, and the valve closing stroke of the solenoid valve 100 is 3 mm, and the distance D is 3 mm.

[0066] Embodiment 3

[0067] A solenoid valve 100 is provided, and the valve closing stroke of the solenoid valve 100 is 5 mm, and the distance D is 0 mm.

[0068] Example 4

[0069] A solenoid valve 100 is provided. The valve closing stroke of the solenoid valve 100 is 5 mm, and the spacing D is 2 mm.

[0070] Comparative Example 1

[0071] A solenoid valve is provided. The valve closing stroke of the solenoid valve is 3 mm, and the spacing D is -2 mm.

[0072] Comparative Example 2

[0073] A solenoid valve is provided. The valve closing stroke of the solenoid valve is 3 mm, and the spacing D is 3 mm.

[0074] Comparative Example 3

[0075] A solenoid valve is provided. The valve closing stroke of the solenoid valve is 5 mm, and the spacing D is -2 mm.

[0076] Comparative Example 4

[0077] A solenoid valve is provided. The valve closing stroke of the solenoid valve is 5 mm, and the spacing D is 3 mm.

[0078] The electromagnetic forces generated by the solenoid valves of Examples 1 - 4 and Comparative Examples 1 - 4 were tested and statistically analyzed. The results are shown in Table 1 below.

[0079] Table 1:

[0080] Experiment Valve closing stroke / mm Spacing D / mm Electromagnetic force / N Example 1 3 0 31.14 Example 2 3 2 32.48 Example 3 5 0 31.34 Example 4 5 2 32.61 Comparative Example 1 3 -2 28.79 Comparative Example 2 3 3 32.48 Comparative Example 3 5 -2 27.67 Comparative Example 4 5 3 32.61

[0081] It can be concluded from the test data obtained above that for Examples 1 - 4, for the same valve closing stroke, as the spacing D increases, the electromagnetic force also gradually increases. For Comparative Examples 1 - 4, for the same valve closing stroke as the corresponding examples, when the spacing D is less than 0 mm, the electromagnetic force is relatively low, and when the spacing D is greater than 2 mm, the electromagnetic force is equal to when the spacing D is 2 mm.

[0082] It can be understood that setting the spacing D to be greater than or equal to 0 mm and less than or equal to 2 mm can ensure that the iron core 31 has a relatively high electromagnetic force under the action of the energized coil 40, and at the same time, can ensure the spatial compactness of the solenoid valve 100 of the present application. Thereby improving the valve closing efficiency of the solenoid valve 100 of the present application.

[0083] Please refer to Figure 7 the structural schematic diagram of the magnetic conductive member 50 provided in an embodiment of the present application as shown. And refer to it in conjunction with Figure 2 .

[0084] As Figure 2 and Figure 7As shown, the magnetic conductive member 50 is annular, sleeved on the outer side of the iron core 31, and coaxially fixed with the coil 40. It can be understood that when the coil 40 is powered off, the end of the iron core 31 away from the valve port 21 can pass through the inner ring of the magnetic conductive member 50 to extend out of the magnetic conductive member 50.

[0085] Based on the magnetic circuit of the magnetic induction lines generated by the energized coil 40, it is relatively dispersed and uniform. It can be understood that setting the magnetic conductive member 50 as annular can ensure the uniformity of the magnetic field aggregated by the magnetic conductive member 50, thereby improving the uniform distribution of the magnetic induction lines acting on the iron core 31 via the magnetic conductive member 50, further improving the magnetization efficiency of the iron core 31, and improving the valve closing efficiency of the solenoid valve 100 of the present application.

[0086] It can be understood that in some other embodiments, the magnetic conductive member 50 can also be provided in multiple numbers, and the multiple magnetic conductive members 50 are arranged along the circumferential direction of the coil 40. In some other embodiments, the solenoid valve 100 of the present application further includes a second magnetic conductive member, and the second magnetic conductive member is also fixed on the side of the coil 40 away from the valve port 21 and is spaced apart from the magnetic conductive member 50. Among them, when the coil 40 is powered off, the end of the iron core 31 away from the valve port 21 can extend out of the second magnetic conductive member or may not extend out of the second magnetic conductive member. The present application does not make special restrictions on this.

[0087] In one embodiment, please refer back to Figure 2 and Figure 3 , the valve body 10 includes a housing 11 and a separator 12. Along the axial direction of the coil 40, the end of the housing 11 facing the valve port 21 is provided with a first opening 111, and an inner cavity 10a is arranged in the housing 11, and the first opening 111 is communicated with the inner cavity 10a. The separator 12 is located between the housing 11 and the valve port 21, fixed to the housing 11, and shields the first opening 111. That is, the separator 12 cooperates with the housing 11 to form an inner cavity 10a on the side of the separator 12 away from the valve port 21.

[0088] The separator 12 is provided with a guiding hole 121, and the guiding hole 121 communicates the inner cavity 10a and the valve port 21. The valve core 30 passes through the guiding hole 121 and extends out of the valve body 10. Specifically, the valve core 30 further includes a guide rod 33. One end of the guide rod 33 is fixedly connected to the end of the plug 32 away from the valve port 21, and the other end passes through the guiding hole 121 and extends into the coil 40, and is fixedly connected to the iron core 31 in the coil 40.

[0089] It can be understood that when the coil 40 is energized, the energized coil 40 cooperates with the magnetic conductive member 50, so that the iron core 31 can slide towards the valve port 21 under the drive of the electromagnetic force of the energized coil 40, and drive the plug 32 to slide towards the valve port 21 through the guide rod 33 until the plug 32 closes the valve port 21, realizing the valve closing function of the solenoid valve 100 of the present application.

[0090] In one embodiment, as Figure 2 andFigure 3 As described above, along the axial direction of the coil 40, the projection of the iron core 31 on the spacer 12 covers the guiding hole 121, so as to prevent the iron core 31 from sliding out of the inner cavity 10a during the sliding of the iron core 31 relative to the valve body 10.

[0091] As Figure 2 and Figure 3 shown, the end of the coil 40 facing the valve port 21 is in mutual contact with the spacer 12. It can be understood that the setting of the spacer 12 ensures the relative positional relationship between the iron core 31 and the coil 40 during the sliding of the iron core 31 relative to the valve body 10, ensures the action effect of the electromagnetic force of the energized coil 40 on the electromagnetic force of the iron core 31 during the sliding process, and ensures the valve closing function of the solenoid valve 100 of the present application.

[0092] In an embodiment, the outer shell 11 has magnetic permeability. Along the radial direction of the coil 40, the outer ring of the coil 40 is in mutual contact with the inner wall of the outer shell 11, and the outer ring of the magnetic conductive member 50 is also in mutual contact with the inner wall of the outer shell 11.

[0093] The spacer 12 has magnetic permeability. The spacer 12 includes a connected main body portion 122 and a protruding portion 123. The main body portion 122 is fixed to the inner wall of the outer shell 11. The protruding portion 123 is provided on the surface of the main body portion 122 away from the valve port 21, extends along the axial direction of the coil 40 towards the iron core 31, and is spaced from the iron core 31. The coil 40 is also sleeved outside the protruding portion 123, and the end of the coil 40 facing the valve port 21 is in contact with the surface of the main body portion 122 where the protruding portion 123 is provided.

[0094] The magnetic induction lines generated by the energized coil 40 can enter the outer shell 11 under the action of the outer shell 11, be transmitted along the axial direction of the coil 40 by the outer shell 11 to the magnetic conductive member 50, and then be transmitted along the radial direction of the coil 40 by the magnetic conductive member 50 to the iron core 31. The magnetic induction lines transmitted into the iron core 31 will be transmitted along the axial direction of the coil 40 to the protruding portion 123 spaced from the iron core 31, and then be transmitted along the radial direction of the coil 40 by the main body portion 122 to the outer shell 11, and be transmitted back to the coil 40 by the outer shell 11. Thus, a complete magnetic circuit loop is formed.

[0095] It can be understood that setting the outer shell 11 and the spacer 12 both having magnetic permeability can, while forming the complete magnetic circuit loop of the solenoid valve 100 of the present application, further improve the concentration degree of the magnetic induction lines generated by the energized coil 40, further improve the magnetization efficiency and magnetic flux of the energized coil 40 on the iron core 31, further improve the electromagnetic force of the energized coil 40 on the iron core 31, and further improve the valve closing efficiency of the solenoid valve 100 of the present application.

[0096] In an embodiment, as Figure 2 and Figure 3As shown, the solenoid valve 100 of the present application further includes an elastic member 60, and the elastic member 60 abuts between the iron core 31 and the protruding portion 123 of the isolation member 12. Among them, when the coil 40 is energized, while the iron core 31 slides toward the valve port 21, the elastic member 60 will also be compressed, so that elastic force is stored in the elastic member 60.

[0097] When the coil 40 is switched from the energized state to the de-energized state, the electromagnetic force acting on the iron core 31 disappears, and the elastic force stored in the elastic member 60 will push the iron core 31 to slide in the direction away from the valve port 21, thereby driving the plug 32 to open the valve port 21 through the guide rod 33, realizing the valve opening function of the solenoid valve 100 of the present application.

[0098] Among them, the elastic member 60 is set as a pre-compressed spring, so that the elastic member 60 can apply a force away from the valve port 21 to the iron core 31 to balance the gravity of the iron core 31 and reduce the influence of the gravity on the valve opening function of the solenoid valve 100 of the present application.

[0099] In one embodiment, the elastic member 60 is a variable pitch spring, and along the axial direction of the coil 40, the pitch of the elastic member 60 close to the valve port 21 is smaller than the pitch of the elastic member 60 away from the valve port 21. That is, along the direction of the valve body 10 toward the valve port 21, the pitch between adjacent coils of the elastic member 60 gradually becomes smaller.

[0100] Since the pitch of the spring determines the compression or elongation of the spring, the smaller the pitch of the spring, the greater the spring constant. During the actual valve closing process, since the magnetization process of the iron core 31 by the coil 40 is carried out step by step, the electromagnetic force received by the iron core 31 before magnetic saturation gradually increases. During the process of the iron core 31 sliding toward the valve port 21, there may be a process in which the electromagnetic force of the iron core 31 is still gradually increasing.

[0101] It can be understood that increasing the pitch of the elastic member 60 at the end close to the iron core 31 can make the elastic force of the elastic member 60 received by the iron core 31 relatively small in the initial motion state, thereby reducing the valve opening difficulty of the solenoid valve 100 of the present application.

[0102] As the electromagnetic force of the iron core 31 reaches saturation, the electromagnetic force received by the iron core 31 reaches the maximum, and the sliding speed relative to the valve body 10 also reaches the maximum. It can be understood that reducing the pitch of the elastic member 60 at the end close to the valve port 21 can make the iron core 31 receive a greater elastic force at the end of the valve closing process, thereby reducing the valve closing speed of the iron core 31, reducing the impact of the plug 32 on the valve seat 20 during valve closing, reducing the valve closing noise, and improving the user experience.

[0103] That is, by setting the elastic member 60 as a variable pitch spring in the solenoid valve 100 of the present application, the elastic force provided by the elastic member 60 can be set based on the movement speed of the iron core 31, while ensuring the valve closing function of the solenoid valve 100 of the present application, reducing the noise generated by the solenoid valve 100 during valve closing, and improving the user experience.

[0104] Among them, in the embodiment of the present application, for one coil of the spring, it can be understood as the spring structure corresponding to the spring rotating 360° along its own axis.

[0105] In one embodiment, as Figure 2 and Figure 3 shown, the solenoid valve 100 of the present application further includes a buffer member 70. The buffer member 70 has elasticity. Along the axial direction of the coil 40, the buffer member 70 abuts between the isolation member 12 and the plug 32 to absorb the impact of the plug 32 moving towards the isolation member 12, thereby reducing the noise during the valve opening process of the solenoid valve 100 of the present application and improving the user experience.

[0106] In one embodiment, as Figure 2 and Figure 3 shown, the solenoid valve 100 of the present application further includes a magnetic isolation tube 80. One end of the magnetic isolation tube 80 is received in the coil 40 and sleeved outside the iron core 31, and the other end extends in a direction away from the valve port 21 and is spaced from the iron core 31 along the axial direction of the coil 40.

[0107] It can be understood that the setting of the magnetic isolation tube 80 ensures the insulation effect between the coil 40 and the iron core 31, avoids the situation that the current in the coil 40 directly acts on the iron core 31 resulting in a short circuit of the coil 40, ensures the action of the electromagnetic force of the energized coil 40 on the iron core 31, and ensures the valve closing function of the solenoid valve 100 of the present application.

[0108] At the same time, the setting of the magnetic isolation tube 80 also realizes the sealing of the gap between the coil 40 and the iron core 31, avoids external impurities from entering between the coil 40 and the iron core 31, and prevents the iron core 31 from damaging the coil 40 and the iron core 31 during the sliding process, further ensuring the valve opening function of the solenoid valve 100 of the present application.

[0109] In one embodiment, as Figure 2 and Figure 3As shown, the surface of the main body portion 122 facing the valve port 21 is further provided with a mounting hole 124. The guiding hole 121 is provided on the protruding portion 123 and communicates with the mounting hole 124. The aperture of the mounting hole 124 is larger than that of the guiding hole 121, and the plug 32 is partially received in the mounting hole 124. Along the axial direction of the coil 40, the projection of the plug 32 on the main body portion 122 covers the guiding hole 121, so as to prevent the plug 32 from entering the inner cavity 10a. That is, the setting of the spacer 12 defines the opening stroke and closing stroke of the solenoid valve 100 of the present application.

[0110] The buffer member 70 is received in the mounting hole 124 and is located between the end of the plug 32 away from the valve port 21 and the bottom of the mounting hole 124 along the axial direction of the coil 40. The outer wall of the plug 32 and the inner wall of the mounting hole 124 cooperate with each other to limit the radial wobbling of the plug 32 when sliding relative to the valve body 10, ensuring the relative positional relationship between the plug 32 and the valve port 21, and further ensuring the closing effect of the solenoid valve 100 of the present application.

[0111] In one embodiment, as Figure 2 and Figure 3 shown, along the radial direction of the coil 40, a first mounting groove 1221 is provided on the outer wall of the main body portion 122. The solenoid valve 100 of the present application further includes a first sealing ring 91. The first sealing ring 91 is partially received in the first mounting groove 1221 and abuts against the inner wall of the outer shell 11 to achieve sealing between the outer shell 11 and the spacer 12.

[0112] In one embodiment, as Figure 2 and Figure 3 shown, the outer shell 11 further includes a second opening 112. The second opening 112 is provided at the end of the outer shell 11 away from the valve port 21, and the second opening 112 communicates with the inner cavity 10a. The valve body 10 further includes a protective cover 13. The protective cover 13 is fixed to the end of the outer shell 11 away from the valve port 21 and shields the second opening 112. Among them, the protective cover 13 cooperates with the outer shell 11 and the spacer 12 to form the inner cavity 10a.

[0113] It can be understood that the setting of the protective cover 13 blocks the possibility of external impurities entering the inner cavity 10a through the second opening 112, avoids the influence of external impurities on the movement state of the iron core 31, and further ensures the opening function and closing function of the solenoid valve 100 of the present application.

[0114] In one embodiment, as Figure 2 and Figure 3 shown, a second mounting groove 113 is provided on the outer shell 11. The solenoid valve 100 of the present application further includes a second sealing ring 92. Along the radial direction of the coil 40, one end of the second sealing ring 92 is received in the second mounting groove 113, and the other end abuts against the protective cover 13 to achieve sealing of the gap between the protective cover 13 and the outer shell 11.

[0115] In one embodiment, as Figure 2 and Figure 3 shown, a third mounting groove 23 is further provided on the valve seat 20. The solenoid valve 100 of the present application further includes a third sealing ring 93. The third sealing ring 93 is partially received in the third mounting groove 23 and partially exposed from the valve seat 20. When the solenoid valve 100 of the present application is connected to an external structure, the third sealing ring 93 is used to seal the gap between the valve seat 20 and the external structure.

[0116] In one embodiment, as Figure 2 and Figure 3 shown, a positioning hole 312 is provided in the iron core 31. A limiting protrusion 3121 extending along the radial direction of the positioning hole 312 is provided in the middle of the positioning hole 312. The end of the guide rod 33 far from the plug 32 can extend into the positioning hole 312 and is embedded in the space formed by the limiting protrusion 3121, so as to realize the fixed connection between the guide rod 33 and the iron core 31. The elastic member 60 is sleeved on the outer edge of the guide rod 33 and abuts against the surface of the limiting protrusion 3121 far from the valve port 21.

[0117] In one embodiment, as Figure 2 and Figure 3 shown, the plug 32 is further provided with a vent hole 321, and the vent hole 321 is communicated with the mounting hole 124. Along the radial direction of the coil 40, a gap is left between the guide rod 33 and the inner wall of the guiding hole 121, and a vent hole (not shown in the figure) extending along the axial direction of the guide rod 33 is provided in the guide rod 33.

[0118] It can be understood that the gas in the external pipeline can sequentially enter the vent hole 321 through the valve port 21. Part of the gas enters the mounting hole 124 and flows into the gap between the iron core 31 and the spacer 12 through the gap between the guide rod 33 and the guiding hole 121. Another part of the gas enters the upper end of the positioning hole 312 far from the valve port 21 through the vent hole and enters the gap between the magnetic isolation tube 80 and the iron core 31. Thus, the relative two ends of the iron core 31 are communicated with the external environment along the axial direction of the coil 40, ensuring the smoothness of the iron core 31 during the relative sliding process, reducing the influence of the atmospheric pressure during the sliding process on the iron core 31, and improving the opening efficiency and closing efficiency of the solenoid valve 100 of the present application.

[0119] In one embodiment, as Figure 2 and Figure 3 shown, the coil 40 includes a coil body 41 and a bushing 42. The bushing 42 is provided in a tubular shape and is sleeved on the outer sides of the iron core 31 and the protrusion 123. The coil body 41 is wound around the outer edge of the bushing 42 to form the coil 40.

[0120] The coil 40 further includes a conducting member 43. The protective cover 13 is also provided with a through hole 131. The conducting member 43 is fixed to the side of the magnetic conductive member 50 away from the valve port 21. One end of the conducting member 43 is electrically connected to the coil body 41, and the other end passes through the through hole 131 and exposes outside the valve body 10, so as to be electrically connected to an external circuit and realize the energization of the coil 40.

[0121] In one embodiment, as Figure 2 , Figure 3 and Figure 7 shown, the magnetic conductive member 50 is further provided with avoidance grooves 52. There are two avoidance grooves 52, and they are axially symmetrically arranged to allow the conducting member 43 to pass through the magnetic conductive member 50 and be electrically connected to the coil body 41.

[0122] Please refer to Figure 8 another schematic structural diagram of the solenoid valve 100 provided in an embodiment of the present application shown.

[0123] As Figure 8 shown, the end of the guide rod 33 facing the valve port 21 also passes through the plug 32 and extends into the air guide hole 321. The end of the guide rod 33 facing the valve port 21 is also provided with a protective sleeve 34. The protective sleeve 34 is fixedly arranged around the outer edge of the guide rod 33 to reduce the communication path between the air guide hole 321 and the valve port 21. While ensuring the air pressure balance on both sides of the iron core 31 during the sliding process of the iron core 31, it reduces the possibility of impurities in the external first pipeline entering the inner cavity 10a.

[0124] It should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include one or more of the described features. In the description of the embodiments of the present application, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0125] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples" or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0126] It should be understood that the application of this application is not limited to the above examples. For those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of this application. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of this utility model still fall within the scope covered by this utility model.

Claims

1. A solenoid valve (100), characterized in that: The invention comprises a valve body (10) and a valve port (21) which are fixedly connected, and a valve core (30), a coil (40) and a magnetic conductive member (50) which are arranged in an inner cavity (10a) of the valve body (10), wherein the valve core (30) is slidably connected to the valve body (10), the coil (40) is sleeved on the outer side of the valve core (30), and the magnetic conductive member (50) is fixed to a side of the coil (40) which is away from the valve port (21); The valve core (30) comprises a plug (32) and an iron core (31) which are fixedly connected. Along the axial direction of the coil (40), the plug (32) is located between the iron core (31) and the valve port (21). The magnetic conductive member (50) is used to cooperate with the energized coil (40) to drive the iron core (31) to slide and drive the plug (32) to close the valve port (21). When the coil (40) is powered off, the end of the iron core (31) away from the valve port (21) extends out of the magnetic conductive member (50), or is flush with the end surface of the magnetic conductive member (50) away from the valve port (21); when the coil (40) is powered off, the length of the iron core (31) extending out of the magnetic conductive member (50) is less than or equal to 2 mm; The solenoid valve (100) further comprises a second magnetic conductive member, and when the coil (40) is powered off, the end of the iron core (31) away from the valve port (21) extends out of the second magnetic conductive member.

2. The solenoid valve (100) according to claim 1, characterized in that: The magnetic conductive member (50) is annular, and the magnetic conductive member (50) is coaxially fixed with the coil (40); or There are a plurality of magnetic conductive parts (50), and the plurality of magnetic conductive parts (50) are arranged along the circumferential direction of the coil (40).

3. The solenoid valve (100) according to claim 1 or 2, characterized in that: The valve body (10) comprises an outer shell (11) and an isolating member (12). Along the axial direction of the coil (40), the isolating member (12) is fixed between the outer shell (11) and the valve port (21). A guide hole (121) is provided on the isolating member (12). The valve core (30) passes through the guide hole (121) and extends out of the valve body (10).

4. The solenoid valve (100) according to claim 3, characterized in that: Along the axial direction of the coil (40), the projection of the iron core (31) on the isolating member (12) covers the guide hole (121), and the isolating member (12) is used to prevent the iron core (31) from sliding out of the inner cavity (10a).

5. The solenoid valve (100) according to claim 3, characterized in that: The housing (11) has magnetic conductivity, and / or the isolation member (12) has magnetic conductivity.

6. The solenoid valve (100) according to claim 3, characterized in that: The solenoid valve (100) further comprises an elastic member (60), wherein the elastic member (60) is abutted between the iron core (31) and the isolation member (12), and when the coil (40) is powered off, the elastic member (60) pushes the iron core (31) to slide away from the valve port (21) to drive the plug (32) to open the valve port (21).

7. The solenoid valve (100) according to claim 6, characterized in that: The elastic member (60) is a variable pitch spring, and along the axial direction of the coil (40), the pitch of the elastic member (60) close to the valve port (21) is smaller than the pitch of the elastic member (60) away from the valve port (21).

8. The solenoid valve (100) according to claim 3, characterized in that: The solenoid valve (100) further comprises an elastic buffer (70), wherein the buffer (70) is abutted between the isolation member (12) and the plug (32) to absorb the impact generated when the plug (32) contacts the valve port (21).

9. The solenoid valve (100) according to claim 1 or 2, characterized in that: The solenoid valve (100) further comprises a magnetic isolation tube (80), wherein the magnetic isolation tube (80) is at least partially accommodated in the coil (40) and sleeved on the outside of the iron core (31).

10. A shock absorber, characterized in that: It comprises a shell, a piston, an oil storage tank, and a solenoid valve (100) as described in any one of claims 1 to 9, wherein the piston is slidably connected to the shell, one end of the solenoid valve (100) is used to connect to the inside of the shell, and the other end is used to connect to the oil storage tank, and the solenoid valve (100) is opened and closed to control the shock-absorbing oil in the oil storage tank to enter the shell, so as to cooperate with the piston to achieve shock absorption.

11. A vehicle, characterized in that: It comprises a vehicle body, a wheel, and a shock absorber as claimed in claim 10, wherein the wheel is rotatably connected to the vehicle body, the housing of the shock absorber is fixed to the vehicle body, and the piston of the shock absorber is fixed to the wheel to absorb vibration between the wheel and the vehicle body.

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